arduous
/ˈɑɹ.d͡ʒu.əs/ adjective C2- Needing or using up much energy; testing powers of endurance. · The movement towards a peaceful settlement has been a long and arduous political struggle.
- Difficult or exhausting to traverse.
From the library
You don’t know what it is to be awakened out of a sound sleep, after a long and arduous journey, by two great girls coming bounce down on you.”
They packed their meager remaining possessions into heavily overloaded automobiles and initiated an arduous migration westward toward the promise of California.
Clemens embarked on this arduous apprenticeship in his early twenties, dedicating himself to the monumental task of learning the river by heart.
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